Ok - I've got the place! The tenative date is MAY 12. I have to secure things tomorrow, and when it's confirmed I will post more then.
Specnatz - thanks for your offer, but I had already secured 2 spots and needed to pick one. Also - people will want to leave on their own terms not to mention liability issues that could arise for your sister/property owner.
This is not at a Bar/Restaurant, so you will be able to bring your own alchohol, food and whatnot.